Index: lib/DBEngine.class.php
===================================================================
--- lib/DBEngine.class.php	(revision 176)
+++ lib/DBEngine.class.php	(working copy)
@@ -316,11 +316,18 @@
 		$msg_status = $cur_msg_array[0];
 		if ($msg_status['rs'] == 'p' && $flag == 'v') return true;
 
+		$query0 = 'SELECT id FROM maddr WHERE email=?';
+		$values0 = array($mail_rcpt);
+		$q0 = $this->db->prepare($query0);
+		$result0 = $this->db->execute($q0, $values0);
+          	$rs0 = $result0->fetchRow();
+		$id = $rs0['id'];
+
 		$query = 'UPDATE msgrcpt SET rs=?'
                         	. ' WHERE mail_id=?'
-				. ' AND rid=(SELECT id FROM maddr WHERE email=?)';
+				. ' AND rid=?';
 
-		$values = array($flag, $mail_id, $mail_rcpt);
+		$values = array($flag, $mail_id, $id);
 
 		// Prepare query
 		$q = $this->db->prepare($query);
@@ -329,6 +336,8 @@
 		// Check if error
 		$this->check_for_error($result, $query);
 
+		$result0->free();
+
 		return true;
 	}